COURSE of the MONTH

Removing a legacy Exchange 2007 server from the domain

Hi Folks,
We have an Exchange 2007 Hub Transports/Mailbox server that was shut down and repurposed without uninstalling exchange or un-domaining it so it lingers on in our Exchange environment and AD.
I'm pretty sure it needs to be removed using ADSIEDIT but I'd like specific instructions if anyone has done this before.